engleski

Operation strategies of solar trigeneration plant in residential building

Actual trends of increased utilization of renewable sources in residential sector impose new requirements for domestic energy system operation. As one of potential competitive options for energy autonomous buildings is a solar trigeneration system based on photovoltaic thermal collectors coupled with heat pump and thermal storage. Recent research results have shown that high level of energy autonomy could be achieved by utilization of such systems in residential building located even within European continental climate zone. Since unbalance between local electricity generation and demand is inevitable, some interactions with electricity market should be also considered. It is particularly interesting in the light of fact that in near future access to the hourly electricity market will be enabled to all households thus acting as prosumers. For selected family low-energy house (180 m2 heated and cooled area, 75 m2 useful roof area, located in northwest Croatia) the energy system consisted of photovoltaic thermal collector, heat storage, heat pump and auxiliary energy sources is sized to cover the most of electricity, heating and cooling demand. By analysis of yearly operational profiles required exchange of energy with electricity market will be calculated. Detailed mathematical model of the system coupled with residential building spaces will be used for hourly simulation in order to evaluate various operation strategies with the goal to increase either renewable energy sources utilization or profitability. Different control algorithms have been compared in typical days defined by profiles of energy demands, insulation and electricity price. The simulation results will show the relation between control algorithm complexity and system viability.

PVT, trigeneration, operational strategies

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